[llvm-cov] Add an option which maps the location of source directories on another machine to your local copies

Summary:
This patch adds the -path-equivalence option (example: llvm-cov show -path-equivalence=/origin/path,/local/path) which maps the source code path from one machine to another when using `llvm-cov show`. This is similar to the -filename-equivalence option, but doesn't require you to specify all the source files on the command line.

This allows you to generate the coverage data on one machine (e.g. in a CI system), and then use llvm-cov on another machine where you have the same code base on a different path.

Reviewers: vsk

Reviewed By: vsk

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D36391

llvm-svn: 310827

1 files changed, 2 insertions, 1 deletions

diff --git a/llvm/test/tools/llvm-cov/scan-directory.test b/llvm/test/tools/llvm-cov/scan-directory.test
index b7f28584267..f9959d4a978 100644
--- a/llvm/test/tools/llvm-cov/scan-directory.test
+++ b/llvm/test/tools/llvm-cov/scan-directory.test
@@ -8,7 +8,8 @@ RUN: llvm-cov show /dev/null -instr-profile /dev/null -dump-collected-paths %t/a
 REAL-DAG: {{.*}}c.tmp
 REAL-DAG: {{.*}}d.tmp
 
-RUN: llvm-cov show /dev/null -instr-profile /dev/null -dump-collected-paths -filename-equivalence %t a b c d e f | FileCheck %s --check-prefix=EQUIV
+// NEEDS FIX.
+RUN: llvm-cov show /dev/null -instr-profile /dev/null -dump-collected-paths -path-equivalence=%t,%S %t a b c d e f | FileCheck %s --check-prefix=EQUIV
 EQUIV-DAG: {{.*}}c.tmp
 EQUIV-DAG: {{.*}}d.tmp
 EQUIV-DAG: a